Dear Christophe,
in message D96E2AFA0DF3D211B1390090274549480373629A@helios.gnv.tcc.thomson-csf.com you wrote:
Is there any mechanism for software flow control ( XON, XOFF ) ?
No there is none, and there is no need for one.
It seems that loads works fine when I download small files but get lost with big ones. So I fear a flow control problem.
I don't think so. Even at high baud rates (like 115200 bps) there is more than enough time to receive characters through the serial line - remember that U-Boot is strictly single-tasking, so the CPU has nothing better to do but to wait for characters.
What is the problem with minicom for loads ? I think that loads just expect
Minicom is broken.
to receive ascii data. Is it wrong to send srec file using ALT S in minicom ( and choosing ascii data ) ?
It's not exactly wrong, but it's calling for a lot of trouble. If you really must use S-Records, use the "cu" command from the UUCP package. Alternatively I recommend to use the "loadb" command and C-Kermit for the download. This is much faster, and more reliable.
Best regards,
Wolfgang Denk